Shuttering board



Jan.13,1942. WQGDUN'CAN 2,270,1144

SHUTTERING BOARD Filed May '7, 1940 Patented Jan. 13, 1942 'rr carrier SHUTTERING BOARD William Galloway Duncan, London, England, as-

signor to Interlcx Structures Limited, London,

England lApplication May 7,1940, Serial No. 333,865 In Great 'Britain July 13, 1939 This invention relates to-improvementsin the construction' of walls, partitions, slabs roofs or floors or the like by employing shuttering between or on which a material, such as concrete, is poured. andthen'left to set..

The primary objectof this invention is to provide a construction in which the interior surface of the finished wall or the like is insulated from the exterior, thus ensuring waterproofing, and, further, forming an insulation against changes in temperature. A further object is to provide an interior surface which can be readily treated to suit desired internal decorations. With these and other objects which will be apparent from the following specification, the invention may be said to consist in a lining or permanent shuttering for a Wall, ceiling or floor surface, for use wherein the Wall or the like is constructed from concrete or like material which is cast in situ .between or on shuttering, comprising a front sheet or board having a face of desired charac terization, and a rear board of sound and heat insulating material, the two said boards comprising a unitary lining or permanent shuttering for one or both faces of the wall or the like, the

rear board being for-med or provided with means which will key with the pourable material.

With such a construction, the face of the front board can be arranged to present any desired surface which lends itself to suitable finishing. For example, the front board may be of hard Wood and the face thereof polished, painted or otherwise treated. Other suitable materials, such as plaster, ply or cement board 0r linoleum, may, however, be used.

Further, the rear boa-rd has the required physi- Figure 2 isa sectional view showing an alterna-- other material 2 is secured to one face of said number of undercut or dovetail strips 4 are secured to the said face, said strips being of hard lnbre board, wood, sheet steel or other suitable material. In Figure 2, undercut apertures, one of which, 5, is shown, are formed in the foundation or rear board I at suitable spaced-apart points, that is, as shown, the apertures 5 are wedge-shaped with the wedge end of smaller width thereof on the exposed face of rear board l. After the keyways or the like have been formed in or on or secured to the board the cal properties and is therefore constructed from a heat and sound insulating material, such as a board including cork or fibre in its composition.

It will beA understood that the rear board is arcordance with the invention, and a preferred method of building a Wall and ceiling therewith.

1n the drawings:

Figure 1 is a perspective view of a portion. of

shuttering constructed in accordance with the invention,

rear surface thereof is treated or coated with a waterproof material or layer 5.

In use, the material, such as concrete, is poured in the usual way, and, for walls, the shuttering is built up and suitably supported, one side at least consisting of the improved shuttering above set out.

In cases where the external Wall or like surface is to form an outside surface, a shuttering consisting of board may be employed. Referring t-o Figure 3, said boards 'l are conveniently plywood boards, the layers of which are secured together by means of a waterproof cement, preferably a synthetic resinous material. Such boards are extremely rigid and durable and, moreover, are not materially affected .by heat or water. Further, the said boards may be employed in the construction of the internal shuttering hereinbefore described.

, It will be understood that both faces may Ibe formed by the improved shuttering herein described and suitable means will be provided for spacing the two layers in correct spaced-apart and parallel relation.

In Figure 3, the support for the rear shuttering comprises lattice work 8 which is constructed from angle iron, said lattice Work being held in position and braced .by suitable means, not shown, and, if necessary, secured to the shuttering until after the initial setting of the concrete 9.

The inner shuttering comprises a number of boards held in co-planar position as shown, While the ceiling is similarly constructed, the boards being suitably supported until after setting of the concrete roof I0.

By employing the shuttering herein described, the internal surface can be directly painted or otherwise treated, no plastering or other similar treatment being necessary. Further, an unbroken surface is presented and no holes are left as split bolts are not employed. Electric or other conduits, Window and door frames can be supported in position prior to the pouring of the concrete or like material. `The improved shuttering may also be employed for party Walls, in which case it is merely supported in position.

I claim:

l. A composite board for use in constructing permanent shuttering, comprising a front layer formed of ornamental hard Wood, a rear layer of sound and heat insulating material, said front and rear layers being cemented together by a layer of Waterproof adhesive cement, said rear layer being provided With spaced keyways of wedge section having the wedge end of smaller width on the exposed face of said rear layer, said keyways being adapted to receive molded projections formed in situ on moldable material applied to said exposed face.

2. A composite board for use in building up permanent shuttering comprising a front layer having an ornamental face, a rear layer of heat and sound insulating material, an interstitial adhesive waterproof layer uniting said rear insulating layer to said front ornamental layer, said rear insulating layer being provided with a plurality of spaced apart undercut apertures formed therein adapted to receive keying projections formed in situ as moldable material applied to said rear insulating layer, and a thin outer waterproof layer covering the rear outer surface of said rear insulating layer and the portions exposed by said undercut apertures.

WILLIAMGALLOWAY DUNCAN. 

